Love my CineBags backpack

https://www.amazon.com/Cinebags-DSLR-HD-Backpack-CB23/dp/B00858AXQK/ref=sr_1_1?keywords=cinebags&qid=1566319515&s=gateway&sr=8-1

I can fit a whole shoulder rig kit with a V-mount in it with lenses. Strap on a medium tripod to the outside. Chest strap, was it strap.Fits in overhead too.

Small complaint is the rigid plastic piece can dig into your back a little at certain angles, but can usually be adjusted to be comfortable.